Interviewer instructions
This refers to class periods. What we need to get is the number of times periods were cancelled in the past schooling week. Example, if the on Monday the math teacher did not appear in class and was not replaced by another teacher
and on Tuesday the Geography lesson was skipped THEN the answer to the above question will be 2. DO NOT count class sessions where there was a replacement teacher.
IF there were THREE math periods cancelled in one day then the answer will be 3. DO NOT count subjects, COUNT periods.